With --noopt run unoptimized code through optimizer, more optimizations can be done later.

runtime/vm/intermediate_language.cc

Index: runtime/vm/intermediate_language.cc
diff --git a/runtime/vm/intermediate_language.cc b/runtime/vm/intermediate_language.cc
index 47e7dab5dd17252dab67b347c45110feb3f8fa34..c2d5002adee7d4bc803e31d733eb57bece8553c7 100644
--- a/runtime/vm/intermediate_language.cc
+++ b/runtime/vm/intermediate_language.cc
@@ -2938,17 +2938,18 @@ static uword TwoArgsSmiOpInlineCacheEntry(Token::Kind kind) {
 void InstanceCallInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   Zone* zone = compiler->zone();
   const ICData* call_ic_data = NULL;
-  if (!FLAG_propagate_ic_data || !compiler->is_optimizing()) {
+  if (!FLAG_propagate_ic_data || !compiler->is_optimizing() ||
+      (ic_data() == NULL)) {
     const Array& arguments_descriptor =
         Array::Handle(zone, ArgumentsDescriptor::New(ArgumentCount(),
-                                                        argument_names()));
+                                                     argument_names()));
     call_ic_data = compiler->GetOrAddInstanceCallICData(
         deopt_id(), function_name(), arguments_descriptor,
         checked_argument_count());
   } else {
     call_ic_data = &ICData::ZoneHandle(zone, ic_data()->raw());
   }
-  if (compiler->is_optimizing()) {
+  if (compiler->is_optimizing() && HasICData()) {
     ASSERT(HasICData());
     if (ic_data()->NumberOfUsedChecks() > 0) {
       const ICData& unary_ic_data =
@@ -3054,7 +3055,8 @@ LocationSummary* StaticCallInstr::MakeLocationSummary(Zone* zone,
 
 void StaticCallInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   const ICData* call_ic_data = NULL;
-  if (!FLAG_propagate_ic_data || !compiler->is_optimizing()) {
+  if (!FLAG_propagate_ic_data || !compiler->is_optimizing() ||
+      (ic_data() == NULL)) {
     const Array& arguments_descriptor =
         Array::Handle(ArgumentsDescriptor::New(ArgumentCount(),
                                                argument_names()));